ICD-10-CM
ICD-10 code for Polymyositis (acute) (chronic) (hemorrhagic): M33.20
The ICD-10-CM index points "Polymyositis (acute) (chronic) (hemorrhagic)" to M33.20, Polymyositis, organ involvement unspecified. M33.20 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in M33
A header groups codes and is not billed. A billable code is one you can report.
- M33DermatopolymyositisHeader
- M33.0Juvenile dermatomyositisHeader
- M33.00Juvenile dermatomyositis, organ involvement unspecifiedBillable
- M33.01Juvenile dermatomyositis with respiratory involvementBillable
- M33.02Juvenile dermatomyositis with myopathyBillable
- M33.03Juvenile dermatomyositis without myopathyBillable
- M33.09Juvenile dermatomyositis with other organ involvementBillable
- M33.1Other dermatomyositisHeader
- M33.10Other dermatomyositis, organ involvement unspecifiedBillable
- M33.11Other dermatomyositis with respiratory involvementBillable
- M33.12Other dermatomyositis with myopathyBillable
- M33.13Other dermatomyositis without myopathyBillable
- M33.19Other dermatomyositis with other organ involvementBillable
- M33.2PolymyositisHeader
- M33.20Polymyositis, organ involvement unspecifiedBillable
- M33.21Polymyositis with respiratory involvementBillable
- M33.22Polymyositis with myopathyBillable
- M33.29Polymyositis with other organ involvementBillable
- M33.9Dermatopolymyositis, unspecifiedHeader
- M33.90Dermatopolymyositis, unspecified, organ involvement unspecifiedBillable
- M33.91Dermatopolymyositis, unspecified with respiratory involvementBillable
- M33.92Dermatopolymyositis, unspecified with myopathyBillable
- M33.93Dermatopolymyositis, unspecified without myopathyBillable
- M33.99Dermatopolymyositis, unspecified with other organ involvementBillable
Related conditions
Related pages
- M33.20 code detailsNotes, nearby codes, CMS-HCC group
- Category M33Every code under it
- Chapter 13Diseases of the musculoskeletal system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Polymyositis (acute) (chronic) (hemorrhagic)?
The ICD-10-CM index points "Polymyositis (acute) (chronic) (hemorrhagic)" to M33.20, Polymyositis, organ involvement unspecified. M33.20 is a billable code.
Is M33.20 billable?
Yes. M33.20 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What chapter is M33.20 in?
Chapter 13. Diseases of the musculoskeletal system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.